dye|World dye variety

Name:C.I.Food Yellow 5,C.I.18965

Molecular Structure: Single azo class

C.I.Food Yellow 5,C.I.18965,CAS 6359-98-4,C16H10Cl2N4Na2O7S2,551.29,Covasol Yellow W 1007,Yellow 2G 90144

Molecular Formula:C₁₆H₁₀Cl₂N₄Na₂O₇S₂

Molecular Weight: 551.29

CAS Registry Number:6359-98-4

Manufacturing Methods :  4-Aminobenzenesulfonic acid diazo, and 2,5-Bichloro-4-(3-methyl-5-oxo-4,5-dihydropyrazol-1-yl)benzenesulfonic acid coupling.

Properties and Applications: yellow. Soluble in water (green light yellow) and soluble fiber element, slightly soluble in ethanol and acetone, insoluble in other organic solvents. The strong sulfuric acid for green light yellow, dilute no precipitation; In nitric acid solution for red light yellow. The dye solution to join strong hydrochloric acid discoloration; Add thick sodium hydroxide solution basic discoloration. And C.I. Acid yellow 17 and the same chemical structure.

List of Suppliers:

Covasol Yellow W 1007 ( Les Colorants Wackherr )

Yellow 2G 90144( Anstead International )